Federal judges are ruling against some of President Trump's executive orders. But who enforces a judicial ruling against the president? NPR asks University of Texas law professor Tara Grove.
NPR's Steve Inskeep speaks with author Marc Dunkelman on why, according to his forthcoming book "Why Nothing Works," progressives made it difficult for government to function.
Margaret Wallace, who teaches air traffic control and airport management at the Florida Institute of Technology, discusses the outdated technology underlying the U.S. air traffic control system.